正常皮肤上常有大量微生物存在。这些微生物可分为临时沾染阳长期寄生两大类。前一类系由外界沾染所致,位于皮肤表面。其种类和数量,取决于个人的卫生习惯、环境的卫生状况以及接触污染物品的程度。临 Normal skin often have a large number of microorganisms. These microorganisms can be divided into two categories: temporary infection of the long-term parasitism. The former is caused by external contamination and is located on the skin surface. The type and amount depend on the individual’s hygiene habits, the hygienic conditions of the environment and the level of exposure to the contaminated items. Pro